Just saw this and thought I needed to share it!
This device recently won a ‘best of show’ award at a Macworld conference. This replaces one (or more) of your electrical outlets and includes a built-in transformer and you can plug in two USB charging cables along with two standard 3 prong electrical cords.
These are made by FastMac.
Plug your iPhone or other USB device in to charge without having to locate the power adaptor.